Buffer overflow in the skey_challenge function in ftpd.c for wu-ftp daemon (wu-ftpd) 2.6.2 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a s/key (SKEY) request with a long name.
https://exchange.xforce.ibmcloud.com/vulnerabilities/13518
http://www.securityfocus.com/bid/8893
http://www.redhat.com/support/errata/RHSA-2004-096.html
http://www.debian.org/security/2004/dsa-457
http://unixpunx.org/txt/exploits_archive/packetstorm/0310-advisories/wuftpd-skey.txt